Note 9 — Chapter XII · MAPPING AND CHARTING FROM THE AIR (Figs. 54 to 82)
Reading edition
E. Lester Jones: The Aeroplane in Surveying and Mapping, Flying, June, 1919, pp. 438-441, 472, and 476.
Reading edition
E. Lester Jones: The Aeroplane in Surveying and Mapping, Flying, June, 1919, pp. 438-441, 472, and 476.